Lamp base



FIG. 1 is a perspective view of a lamp base, with a lamp shade sketched in dotted lines for environmental purposes, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 5 is a right side elevational view, the left side elevational view being a mirror image; and,

FIG. 6 is a perspective view of a second embodiment of the design as shown in FIGS. 1-5,with the only difference being the extent of the vertical portion, and with a lamp shade sketched in dotted lines for environmental purposes. 

The ornamental design for a lamp base, as shown and described. 